Locomotive-boiler support



Nov. 22, 1927.

A. w. BRUCE LOCOMOTIVE BOILER SUPPORT 2 Sheets-Sheet Filed Defi. 8, 1926 Nov. 22, 1927.

A. W. BRUCE LOCOMOTIVE BOILER SUPPORT Filed Dec. 1926 -FIG. 5:-

WITN SSES 2 Sheets-$heet 2 Patented Nov. 22, 1927.

'rf TES ALFRED W. BRUCE, GFNEW YORK, N. Y.

nocomorivn-nornnr. surronr.

Application filed December 8, 1926., Serial No. 153,309.

I My invention more particularly relates to a multiplex boiler support for locomotives of the Mallettype, and has for an object to provide a supporting structure, in which the stresses imposed on a plurality of connections between the saddles and the boiler, will be efiiciently distributed to the connections for the several saddles, thus obviating the localization of stresses of undesirable magnitude, on the connections of any of the saddles.

The improvement claimed is hereinafter fully set forth. v

The Mallet; or articulated type locomotive, comprises front and rear frames, pivoted together to enable the front engine frame to swivel in the manner of a leading truck, when traversing curved track, and to return to normal longitudinal alignment when traversing tangent track. The cylinders of a high pressure engine are mounted on the rear frame, and the cylinders of a low pressure engine are mounted on the front frame. Ithas been the usual practice to secure the boiler by studs passing through its shell, to independent saddles, one of which is bolted to the cylinder castings onthe rear frame, and the others of which, are slidably mounted on bearing plates, supported on crossties connecting the side members of the front frame. form of construction is thatthe stresses encountered in service are not distributed efii-j ciently to the studs of all of the saddles, but

are localized on the studs of particular sad-i dles, with the result that stresses of sufiicientmagnitude to produce steam leaks be tween the studs and boiler shell, are frequently imposed on certain of the studs.

In the present invention, the saddles of the frontand rear engine frames, are rlgidly connected together, and held against longitudinal displacement by longitudinally extending members, sothatstresses, which,

in the construction heretofore knowngwould be localized on thestuds of one of the saddles, willbe efiiciently distributed between the studs of all of the-saddles, thus reducing to a minimum 't'hepossibility ofileaks. The

improvementeffects a material economy, as the replacementiof studs orbolts 1s acostly operation, often necessitating" the removal of the boiler fines, and the consequent keeping A serious objection to this service for long p,

view of the multiplex boiler support Fig. 3,

a central longitudinal section of theconstructlon shown in Fig. 2, a portion of the lower part of the boiler being shown in dot ted lines; Fig. 4, a transverse section on the line an; of Fig. 3; Fig. 5, a transverse section on the line b b of Fig. 3; and Fig. 6, a View lnperspectlve of the multiplex boiler sup- P T E- In the practice of my invention, referring descriptlvely to the specific embodiment thereof which is herein exemplified, as applied in a four cylinder articulated locomotive, having a rear frame, 10, and an independent front frame, 11, each of which is of bar type, compr sing anupper and a lower rail, andis provided with pedestals in which the journalboxes of the driving wheels, 12,

are mounted in the usual manner. The frames. are pivotally coupled together by a kingpin fitting in sockets in extensions on the rear and front frames, the construction permitting swiveling movements of thefront frame from its normal position in line longitudinally with the boiler, in passing from a a tangent to a curve of the track, and into" said normal position in passing from, a curve to .a tangent; and "the maintenance ofv the front frame in normal position while the locomotive is traversing tangent or straight portions'of the trait: H

A pairof cylinders, 13, is mounted on the forward end of the rear frame, and a pair of cylinders, 14, is mounted on the forward end of the'front frame.

The forward end of the boiler, '15, is mounted on a multiplex support, comprise inga rear. frame boiler saddle, 16, and front frame boiler saddles, 16 and 16 Eachof the saddles has a substantially. box-shape base,f17, to which is secured a fiange,fl8,

having an upper face curved in correspond H ence with the curvature of the boiler shell. Holes, l9,are formed in. the 'flanges,.l8, for

thereception of suitable studs or bolts,

which connect the boiler to the saddles) The three saddles are rigidly fastened together 7 shown. All of the saddles and their connecting members, are preferably formed together as a one piece cast structure, but it is within the contemplationof the invention to form the parts separately, any suitable fastening means being employed to secure them together.

The rear frame saddle, 16, is rigidl secured to the cylinder casting, 13, by olts passing through suitable holes, in the flanges, 22, and, 23, of the multiplex support.

In order to permit the necessary lateral movement of the front end of the boiler. and its saddles, with relation tothe front frame, the saddles, 16, and, 16', are slidably mounted on hearing plates, 25, carried by supports,

7 26; extending transversely from side to side of the front frame.

From theforegoing description, it will be apparent that the multiplex boiler support will insure efficient distribution of the stresses encountered in service, to the studs or. bolts of each of the saddles, thus obviating the liability. present in structures heretofore known, of stresses of sufficient magnitude to produce leaks, being localized on the/studs or'bolts of one of the saddles.

I claim as" my invention and desire to secure by Letters Patent:

V 1'. A.1nultiplex support for locomotive boilers, formed as an integral casting, and comprising a plurality of boiler saddles, and means formaintaining said saddles in longitudinally spacedj relation.

, 2. A.multiplex support for locomotive boilers, comprising a rear frame boiler saddle, a front frame boiler saddle, and means, independent of the boiler, for maintaining said saddles in longitudinally spaced relation. 7 v

3. A multiplex support for locomotive boilers, formed as an integral casting, and

comprising a rear frame boiler saddle, a front frame boiler saddle, and means for maintaining saidlsaddles in longitudinally spaced relation.-

I 4. A multiplex support for locomotive boilers, comprising a rear frame boiler sad-,

dle, a plurality of front frame boiler sad-,

dles, and means, independent ofthe boiler, for maintaining said saddles in longitudinally spaced relation.

, ,5 Agmultipler support, for locomotive boilers, formed as an integral casting, and comprising a rear frame boiler saddle, a plurality of front frame boiler saddles, and means for maintaining said saddles in longitudinally spaced relation.

6. A multiplex support for locomotive boilers, formed as an integral casting, and comprisin a plurality of boiler saddles, and a longitudinally flanged member for maintaining said saddles in longitudinally spaced relation.

7. A multiplex support for locomotive boilers, comprisinga rear frame boiler saddle, a front frame boiler saddle, and a longitudinally flanged n iember for maintaining said saddles in longitudinally spaced relation.

8. A multiplex support for locomotive boilers, formed as an integral casting, and comprising a plurality of boiler saddles, each embodying a base having a front, rear, and two end walls, and a flange supported on the base and formed with an upper surface curved in correspondence with the boiler and adapted to support the same; and means for maintaining said saddles in longitudinally spaced relation.

9. n'iultiplex sup )ort for locomotive boilers, comprising a plurality of boiler saddles, each embodying, a base, having two end walls, formed with an opening for a centerin rod, and a rear and a front wall: and a flange supported on vthe base, and formed with an upper surface curved in correspondence with the boiler, and adapted to support the same; and a longitudinally flanged member, independent of the boiler, formaintaining the saddles in longitudinally spaced relation.

10. In a locomotive, the combination of two independent frames coupled for relative swivelling movement, a boiler saddle'rigidly secured, to one of the frames, a boiler. saddle slidably mounted on the other frame for transverse movements relative thereto, and means, independent of the boiler, for maintaining the saddles in longitudinally spaced relation,

, 11. In a locomotive of the articulated type, the combination of a boiler; two independent frames for supporting the boiler, coupled for relative swivelling movement; a cylinder casting rigidly secured to one of the frames; a boiler saddle rigidly mounted on said casting; a;boiler saddle slidably mounted on the other frame for transverse movement relative thereto; means for fastening each of-the saddles to the boiler; and means, independent -of' the boiler and, directly connected to each of the saddles, for

distributing stresses encountered in service.

- 1 ,ALFRED W. BRUCE. 

